Arcline 8/212 User Guide V1.0
Page 63
Tail winds cause sound to take a curved path downwards due to the faster resultant speed of
sound at altitude (see above).
Note: all propagation illustrations in this user guide assume that the sound source
is a typical curved line array or cluster with very little propagation upwards or
backwards. Omnidirectional noise sources may act quite differently. For example,
the above tail wind could cause upwards propagation to diffract “up and over” in a large arc,
increasing off-site leakage instead of decreasing it.
Figure A.20: Reduced acoustic propagation due to tail wind
11 Appendix A - Line array basics
Summary of Contents for Arcline 212
Page 1: ...Arcline 8 212 User Guide V1 0 ...
Page 71: ......
